In the past I worked with silica nanoparticles bought from "Nissan Chemicals", Product No. ST-40, see link for other types.
In the company site I can't find that silica anymore.
How can I get that kind of silica NPs.
Is there similar product I can get elsewhere?
Specs: unstabilized 40 Wt%, 10-20 nm size, spherical, pH ~10.
It is crucial that the silica NPs should be free from any stabilization agent, especially from organic stabilizers.
Look the book Iler R.K. The Chemistry of Silica. Wiley-Interscience. 1979. This is the most complete monograph on colloidal silica. I myself have often used it when I was a post-graduate student. I am sure that you can find there an answer to your question.
Thank you.
I also have that book, but I believe that there are companies newer than that book.
Try the LUDOX series from Sigma Aldrich. The series has many variants in size, size distribution and stabilizing method.
e.g. LUDOX® TM-40 colloidal silica , sodium hydroxide stabilized.
Good luck.
Try Sigma-Aldrich. They have variety of surface modified silica nanoparticles.
I tried Ludox, but they have a stabilizer in there. The Ludox solution has an absorption at 300 nm, which does not come from the silica. I can't use nanoparticles with stabilizers as I react them with radicals which are extremely active.
Why don't you try Postnova Analytics? They're a german company with a wide range of nanoparticles, including silica, with our without surface functionality. Size range from 70 nm to 2 um.
Hi Tomer,
I want silica particles with same properties, by the chance did you found any ?
Anna,
I found this product: https://www.alfa.com/en/catalog/043111/
They have several sizes of SiO2.
I have already bought it, but haven't tried it yet.
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